<template>
  <div class="">
    <!-- 导航栏 -->
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/common/back.svg" alt="">
      </div>
      <div slot="center" class="title">
        <div 
        v-for="(item, index) in titles" 
        class="title-item" 
        :key="index"
        :class="{active: index === currentIndex}"
        @click="itemClick(index)"
        >{{item}}</div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
import NavBar from 'components/common/navbar/NavBar'

export default {
  components:{
    NavBar
  },
  data(){
    return {
      titles: ['商品', '参数', '评论', '推荐'],
      currentIndex: 0
    }
  },
  created(){},
  mounted(){},
  watch:{},
  computed:{},
  methods:{

    itemClick(index) {
      this.currentIndex = index
      // 把当前点击的 标题 传递出去
      this.$emit('navClick', index)
    },

    backClick() {
      this.$router.back()
    }
  },
}
</script>
<style scoped>

.title {
  display: flex;
  font-size: 13px;
}

.title-item {
  flex: 1;
}

.active{ 
  color: var(--color-high-text)
}

.back img {
  margin-top: 10px
}

</style>